Full text: papers communicated to the first International Eugenics Congress held at the University of London, July 24th to 30th, 1912

D. C. Gini.Sociology and Eugenics.329 
We must remember that these comparisons are far from being accurate ; 
the influence of migration in man, and of imports and exports in horses, and 
the difference in the relative number of births in the two species, will only 
allow them to bear the character of a rough approximation, the general 
accuracy of which we cannot determine. 
For the data for Italian population see VAnnuario statistico italiano 
(1905-907 Fasc. 1.) Roma, Berto, 1907. For the data relating to equine 
species in different States see la Statistique des superficies, cultives, de la 
production végétale et du bétail dans las pays adhérents, published by the 
Istituto Internazionale di Agricoltura. Roma. Tipografia della Camera 
dei Deputati, 1910. 
(7)—R. J. Ewart. The influence of parental age on of spring. The 
Eugenics Review. Vol. III., No. 3, Oct., 1911 
(8)—The date for Tables III. and V. referring to Greenland allow us 
to estimate at their proper value the assertions of F. Cook (.Journal of 
Gy?iecology and Obstetrics. New York, 1894)—that among the Esquimeaux 
the sexual passion is arrested during the darkness of winter, so that births 
only occur nine months after the appearance of the sun ; and they show 
once again how dangerous it is to use personal impressions for judging the 
behaviour of general phenomena. See Havelock Ellis. Studies in the 
Psychology oj Sex. Vol. III. 
(9)—For instance, if statistics tell us that an abortion is expelled in 
December, and that the period of gestation has been two to three months, it 
will be uncertain whether the month of conception was October or 
September. Similarly, if statistics tell us that an abortion is expelled in 
December, and that the period of gestation has been about two months (that is 
to say, nearer two months than one or three), conception may have occurred 
in October, September, or November. 
The yearly returns of Vienna are divided into the following classes for 
the period of gestation in the case of abortions and still-born : less than one 
month ; one to two months ; two to three, .... eight to nine, and nine to 
ten months, to the limit. In the classification of abortions and still-born, 
according to the month of conception, the abortions with a duration of 
gestation between x and x +1 months expelled in a month y were attributed 
half to conceptions y—x and half to conceptions y—x—1. The still-born at 
the upper limit of gestation period during month y were all put down to 
conceptions in the month y—9. For instance, abortions of two to three 
months of gestation expelled in December were held to have been conceived 
half in October and half in September, those still-born and completely 
developed during December were all held to have been conceived in March. 
The yearly returns for Budapest are divided into the following classes 
for periods of gestation of abortions : one month, two months, up to seven 
months. In the classification of abortions according to month of conception, 
the abortions with a period of gestation of x months expelled in month v
        

Note to user

Dear user,

In response to current developments in the web technology used by the Goobi viewer, the software no longer supports your browser.

Please use one of the following browsers to display this page correctly.

Thank you.